Why is cloning failing for some of the virtual machines after upgrading to OpenShift Virtualization 4.14?

Issue

• After upgrading to OpenShift Virtualization 4.14, I am unable to clone some of the VMs and the cloned VM is stuck in provisioning status. The tmp PVC created for the cloned VM is stuck in pending state:

tmp-pvc-4c643d16-01a3-41bf-a53b-e9aa51b68f6c   Pending                                                                        ocs-external-storagecluster-ceph-rbd   26h

• The csi-rbdplugin-provisioner is repeatedly logging below messages:

I0222 12:16:09.370408       1 event.go:285] Event(v1.ObjectReference{Kind:"PersistentVolumeClaim", Namespace:"test-cnv", Name:"tmp-pvc-4c643d16-01a3-41bf-a53b-e9aa51b68f6c", UID:"cbcb52df-a023-46ac-9493-79a027fd16ac", APIVersion:"v1", ResourceVersion:"228527351", FieldPath:""}): type: 'Warning' reason: 'ProvisioningFailed' failed to provision volume with StorageClass "ocs-external-storagecluster-ceph-rbd": rpc error: code = Internal desc = image not found: RBD image not found